a(n) = Fibonacci(n)*Lucas(n-1).

Terms

a(0) =0a(1) =2a(2) =1a(3) =6a(4) =12a(5) =35a(6) =88a(7) =234a(8) =609a(9) =1598a(10) =4180a(11) =10947a(12) =28656a(13) =75026a(14) =196417a(15) =514230a(16) =1346268a(17) =3524579a(18) =9227464a(19) =24157818a(20) =63245985a(21) =165580142a(22) =433494436a(23) =1134903171a(24) =2971215072a(25) =7778742050a(26) =20365011073a(27) =53316291174a(28) =139583862444a(29) =365435296163